STOCK-BASED COMPENSATION - Schedule of stock-based compensation expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Stock-Based Compensation (Details) [Line Items]
Total stock-based compensation expense	$ 47	$ 73	$ 228	$ 246
Research and development
Stock-Based Compensation (Details) [Line Items]
Total stock-based compensation expense	2	5	8	13
Selling, general and administrative
Stock-Based Compensation (Details) [Line Items]
Total stock-based compensation expense	$ 45	$ 68	$ 220	$ 233